Persist of audiences splits

Description - Ability to persist splits of an audience 

Why is this feature important to you - Usage of experimentation within audiences (test/control/holdout) are important to measuring KPI's of an auidence.

How would you like the feature to work - When a split of an audience is performed, have the ability to select the persistence of the audience based upon a system and or use defined time based value.

Current Behaviour - Audience splits are available in Adobe RTCDP audience compositions, but the split of audiences are not retained after the split is performed.